He says I don't-, and Dean's smile begins to slowly widen, amused and thrilled with the emotional turmoil he can sense rolling off the guy.

"Oh, you sad son of a bitch," he muses sympathetically, though the expression on his face undercuts the gentleness of the words. "I'm not sure which of the two of us you're trying to convince, but you're not pullin' it off either way. You wanna know a secret?"

He leans in slowly, deliberately. The scruff of his facial hair rasps gently against Castiel's cheek as he brings his lips so close to Castiel's ear, they nearly touch down. There, he whispers, "I might have pity-fucked you, but I'd never love you."

He pulls back just to catch the expression on Castiel's face.

And then, in a blink, he disappears.